I've got the PSA 20" upper and it does great. No function issues and it shoots 123 scenars (among others) great. I think I'd pick the 18" if I did it over again but plenty happy with the 20", especially considering how cheap it was. I don't have any concern taking game with it at reasonable distances and it has performed well. As mentioned above, the .243 version looks even better but i'm happy with mine for what i've got in it. Cheap lower, timney trigger, psa upper, PEPR mount, and SS 6x.
